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FENE-P fluid flow between eccentric rotating cylinders is simulated by using an unstructured finite volume method which has second-order accuracy in space. Effects of angular speeds of inner and outer cylinders, viscoelasticity and eccentricity ratio on the flow have been explored by varying different parameters or different computational zones. Results indicate that rotation boundary condition is...
In order to solve the blades broken failure of the lubricating plate in the tandem drive axle, the loading condition of the blades is analyzed and calculated. Furthermore, the blades strength is analyzed based on CFD. Through calculation and comparative analysis, it is indicated that the original design exits some dangerous factors and some improving methods are brought up.
The temperature field of mechanical seals was studied by numeric simulation and experiment, where was only quenching but not washing. The standard k-ε model was used as turbulence model. Through numerical simulation of FLUENT, this paper calculated the temperature field, including the seal and the flow. By means of embedding thermocouple in static ring, the temperature of several points along the...
In this paper, a modified full numerical model will be presented to calculate elastohydrodynamic line contacts in various conditions of geometry and material properties. This model can calculate results in shortest time and with best accuracy. All modifications will be applied in previously developed models to reach demanded results in desired time and accuracy. This model is helpful to get results...
In order to solve the wear numerical simulation and the prediction of reliability lifetime of cylindrical roller bearing, a numerical simulation model of wear for cylindrical roller bearing is established by the method for wear numerical simulation of components. According to the discrete theory, computer technology and dynamic theory of roller bearing, with the wear state of cylindrical roller bearing...
MQL(minimal quantity lubrication) machining produces almost similar cutting performance to conventional flood supply machining while using much less metal working fluid. To take full advantage of MQL machining and expand its applicability, an understanding of its flow field behavior is critical. Hence, in this study, it is analyzed that the influence of airflow movement surrounding workpiece on cutting...
A sliding wear simulation approach based on Archard's wear model was proposed, in which ABAQUS scripting interface was used to simulate the progressive accumulation of wear between contact surfaces. Removal of material caused by wear was implemented by moving boundary nodes. In order to measure wear rates of woven fabric liner, a pin-on-disk experiment was performed. The wear rate of 9.76 × 10-7mm...
A numerical and experimental investigation about effects of cone plate upsetting on the plastic inclusion morphology in the center of forgings was carried out in this paper. The results show that radial dimension of inclusion zone after cone plate upsetting is 80% of the flat plate upsetting under the condition of thermal-mechanical model. However, the percentage is only 70% when cooling influence...
Aiming at the problem of deformation of heavy hydrostatic thrust bearing, finite element method (FEM) is used to conduct its numerical simulation, and the law of the influence of temperature and load on bearing deformation is revealed. Experiment of oil film thickness in different velocity is also made. The results demonstrate that: the free thermal deformation of workbench and base is significant...
For better geometric parameters of spiral grooved dry gas seals, the numerical simulation is carried out, based on the Navier-Stokes (N-S) equation, the laminar model and the SIMPLEC algorithm. Five geometric parameters are investigated emphatically, use one by one optimize method, take opening force, leakage, gas film stiffness and the ratio of stiffness and leakage as the assessing target. Finally,...
This paper describes a numerical study concerning the gap flow performance of multi-pad hydrostatic thrust bearing having sector recesses in the upright numerically controlled lathe. The Finite Volume Method has been used to compute fluid three-dimensional velocity field and pressure field of gap flow between the revolution working table and bearing pad. This study theoretically analyzes the influence...
This paper describes the influences of rarefaction on thin film gas lubrication characteristics by using theoretical analysis and numerical simulation in magnetic hard disk driver. On the view of film thickness, the area scale less than mean free path only accounts on small parts. However, rarefaction region will increase obviously if considering the aspects of both film thickness and pressure. The...
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